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Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:Jim Reynolds开发兼执笔﹑James Burrows执导的《东邻西舍 The Neighborhood》讲述一个原本住在中西部的大好人Dave Johnson（Max Greenfield 饰，代替试映集中的Josh Lawson）举家搬到洛杉矶黑人社区后 ，这儿的人并非都欣赏他的睦邻风格，其中包括主角新邻居Calvin Butler（Cedric the Entertainer饰）。其他主演有Sheaun McKinney﹑Tichina Arnold﹑Beth Behrs﹑Marcel Spears及Hank Greenspan。　　平凡女孩江南雪在爱情友情皆受挫的情况下，机缘巧合与一个外表英俊的小混混互换身体来到男神咖啡厅，与贵公子陆河上演了一场非同寻常又充满欢乐的爱情故事。10日本很多武士都不欢迎纳森的到来，他们坚决不肯抛弃传统的武士道精神，对将武士西化十分反感。他们在首领乌吉奥（真田广之 饰）的带领下举刀起义，躲到了一条偏僻的小山村自立为政。天皇大怒，派纳森率领他训练出来的现代化军队去围剿叛变武士。岂料皇军全军覆没，纳森亦成为了阶下囚……　　袁隆平（黄志忠 饰）：从梦境展开，讲他如何为祖国和世界人民的温饱问题不懈奋斗。"Is there any difference between their tooth shape and the canine teeth of ordinary carnivores?" I cut in a question.